package cn.mldn.amr;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
@WebFilter
public class LoginFilter implements Filter{

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		
		HttpServletRequest servletRequest=(HttpServletRequest)request;
		HttpSession session = servletRequest.getSession();
		
		if(session.getAttribute("emp")!=null){
			chain.doFilter(servletRequest, response);
		}else{
			request.setAttribute("msg", "您还未登录请先登录");
			request.setAttribute("url", "/login.jsp");
			request.getRequestDispatcher("/forward.jsp").forward(servletRequest, response);
			
		}
		
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
